.contentBox {
  width: 80%;
  height: calc(100vh - 90px);
  overflow: hidden;
  overflow-y: scroll;
  margin: 0 auto;
  margin-top: 55px;
  background: #fff;
  padding: 5px 10px;
  padding-top: 0;
  box-sizing: border-box;
}
blockquote {
  border-left: 4px solid #cbcbcb;
  padding: 10px 10px 10px 30px;
  background-color: #f8f8f8;
}